Microphone array mounting device for acoustically detecting leakage of oil and gas pipeline

Abstract

The invention provides a microphone array mounting device for acoustically detecting oil and gas pipeline leakage, which is characterized in that a base is of a hollow structure, a support column is connected in the base, a plurality of microphone pieces are arranged on an integrated microphone array plate, and a plurality of protection holes which are the same as the microphone pieces in position are formed in an array cover plate; fixing holes are formed in the integrated microphone array plate and the array cover plate; the integrated microphone array plate covers an upper side opening of the base, the array cover plate covers the upper side of the integrated microphone array plate and is connected with the base, the microphone piece is surrounded in the protection hole, and the supporting column penetrates through fixing holes in the integrated microphone array plate and the array cover plate. The integrated microphone array plate is embedded into the array base, then the array cover plate is placed on the integrated microphone array plate and the array base, the array base, the integrated microphone array plate and the array cover plate are connected through the long and short fixing strips, the fixing blocks and the fixing bolts, and the effect of simply, stably and reliably fixing the array plate is achieved.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline leak location monitoring technology, and in particular to a microphone array installation device for acoustic detection of oil and gas pipeline leaks. Background Technology

[0002] Oil and gas pipeline leaks can cause soil, water, and air pollution, resulting in significant damage to the ecological environment. Leaks can also lead to fires and explosions, and some leaks may release toxic gases, posing a serious threat to the lives of on-site workers and nearby residents. Furthermore, oil and gas pipeline leaks result in the waste of non-renewable resources and substantial economic losses for businesses. Monitoring the location of oil and gas pipeline leaks is extremely difficult due to various reasons. Oil and gas pipeline systems are vast, often stretching tens or even hundreds of kilometers, and have complex structures with numerous bends, tees, and valves, making location tracking costly and difficult to pinpoint. The highly complex environment in which oil and gas pipeline systems operate, with numerous sources of interference, can easily affect the accuracy of location tracking. Finally, oil and gas pipeline leaks themselves are characterized by diversity and uncertainty.

[0003] Microphone array-based sound source localization technology collects acoustic information of a target sound source using microphone arrays. Then, based on the phase and amplitude differences between the acoustic signals collected by different arrays, and finally processed by a sound source localization algorithm, it achieves the localization of the target noise source. Sound source localization technology is widely used in military, industrial, and civilian fields. As a passive detection technology, sound source localization has all-weather, all-condition early warning capabilities. It can also bypass obstacles for location, has high accuracy, and can collect acoustic signals in real time. Furthermore, it can use voiceprint recognition technology to determine and identify noise under specific conditions. Most importantly, sound source localization equipment is relatively inexpensive, making it suitable for large-scale deployment and particularly suitable for leak monitoring in large spaces such as oil and gas pipelines.

[0004] Existing integrated microphone array boards are difficult to fix in place, and in complex environments, exposed integrated microphone array boards are easily damaged by the surrounding environment, affecting sensor performance. Summary of the Invention

[0005] The purpose of this invention is to provide a microphone array mounting device for acoustic detection of oil and gas pipeline leaks, which can solve the problems of integrated microphone array boards being difficult to fix and easily affected by the surrounding environment, thus affecting performance. This invention provides a microphone array mounting device for acoustic detection of oil and gas pipeline leaks, comprising a base, a support column, an integrated microphone array plate, and an array cover plate. The base is a hollow structure, the support column is connected inside the base, multiple microphone elements are arranged on the integrated microphone array plate, and multiple protective holes with the same positions as the microphone elements are provided on the array cover plate. Both the integrated microphone array plate and the array cover plate are provided with fixing holes. The integrated microphone array plate covers the upper opening of the base, and the array cover plate covers the upper side of the integrated microphone array plate and is connected to the base. The microphone elements are surrounded within the protective holes, and the support column passes through the fixing holes on the integrated microphone array plate and the array cover plate.

[0006] Furthermore, the base includes a regular hexagonal prism, a hollow regular hexagonal frustum, and a hollow regular hexagonal prism, the hollow regular hexagonal frustum being connected to the upper side of the regular hexagonal prism, and the hollow regular hexagonal prism being connected to the upper side of the hollow regular hexagonal frustum; the support column is connected to the upper side of the regular hexagonal prism and is located inside the hollow regular hexagonal frustum.

[0007] Furthermore, the hollow regular hexagonal prism has a circular groove on its upper side, and the integrated microphone array board is disc-shaped and embedded in the circular groove.

[0008] Furthermore, there are three pillars, each tangent to one of the three spaced inner sides of the lower hexagon of the hollow regular hexagonal prism, and the height of the pillar is not less than the distance from the upper side of the regular hexagonal prism to the lower side of the circular groove.

[0009] Furthermore, it also includes a long fixing strip, a short fixing strip, and a fixing block; the hollow regular hexagonal prism has a cuboid groove on its lower side, the long fixing strip and the short fixing strip are placed in the cuboid groove by lateral sliding, the other side of the long fixing strip and the short fixing strip covers the array cover plate, and the fixing block is placed between the long fixing strip and the short fixing strip.

[0010] Furthermore, the hollow regular hexagonal prism has six cuboid grooves, which are rotationally symmetrical about the central axis of the hollow regular hexagonal prism; the depth of the cuboid grooves is less than the thickness of the hollow regular hexagonal prism; the width of the cuboid grooves is less than the distance from the outer edge of the hollow regular hexagonal prism to the outer upper edge of the hollow regular hexagonal frustum; the inner surface of the cuboid grooves coincides with the outer edge of the regular hexagon on the upper upper edge of the hollow regular hexagonal frustum; one side of the cuboid groove extends to the outer edge of the hollow regular hexagonal prism, and the other side extends to another cuboid groove.

[0011] Furthermore, it also includes a fixing bolt, wherein one side of the hollow regular hexagonal prism has a cylindrical groove, and the fixing bolt passes through the fixing block and is inserted into the cylindrical groove.

[0012] Furthermore, the interior of the long fixing strip is provided with channels that are nested with the groove walls of the cuboid groove, and the top of the long fixing strip is an inwardly extending pressure plate, and the array cover plate is pressed onto the hollow regular hexagonal prism by the pressure plate.

[0013] Furthermore, the cross-section of the long fixing strip is composed of a channel formed by rectangles, rectangles, and rectangles, and a pressure plate formed by right-angled trapezoids; the length of the rectangle is the same as the depth of the cuboid groove, and the width of the rectangle is the same as the width of the cuboid groove; the length of the rectangle is the sum of the thickness of the hollow regular hexagonal prism and the thickness of the array cover plate; the length of the rectangle is the sum of the distance from the outer edge of the hollow regular hexagonal prism to the upper outer edge of the hollow regular hexagonal frustum and the width of the rectangle; the height of the right-angled trapezoid is greater than the width of the rectangle.

[0014] Furthermore, the upper regular hexagon of the hollow regular hexagonal frustum has a larger dimension than the lower regular hexagon; the six sides of the regular hexagonal prism coincide with the six outer sides of the lower regular hexagon of the hollow regular hexagonal frustum; the six inner sides of the hollow regular hexagonal prism coincide with the six inner sides of the upper regular hexagon of the hollow regular hexagonal frustum; and the diameter of the inscribed circle of the outer side of the hollow regular hexagonal prism is larger than the diameter of the inscribed circle of the outer side of the upper regular hexagon of the hollow regular hexagonal frustum.

[0015] The technical solution of this invention employs a base to mount an integrated microphone array board, and an array cover plate is placed on the upper side of the integrated microphone array board to fix the microphone array. Supports pass through fixing holes in the integrated microphone array board and the array cover plate to stably support and fix the position of the microphone array. Furthermore, protective holes surround the exposed microphone components, thereby protecting them from damage caused by the surrounding environment and ensuring sensor performance. This invention not only stably and reliably fixes the integrated microphone array but also provides excellent protection for the microphone array and microphone sensor. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the upper side of the present invention.

[0018] Figure 2 This is a schematic diagram of the lower side of the present invention.

[0019] Figure 3 This is a schematic diagram of the base of the present invention.

[0020] Figure 4 These are the top view, front view, bottom view, side view, and top and bottom cross-sectional views of the base of the present invention.

[0021] Figure 5 This is a schematic diagram and three-view drawings of the fixing block of the present invention.

[0022] Figure 6 This is a schematic diagram of the short fixing strip of the present invention.

[0023] Figure 7 These are three views of the short fixing strip of the present invention.

[0024] Figure 8 This is a cross-sectional schematic diagram of the short fixing strip of the present invention.

[0025] Figure 9 This is a schematic diagram of the long fixing strip of the present invention.

[0026] Figure 10 These are three views of the long fixing strip of the present invention.

[0027] Figure 11 This is a schematic diagram and three-view drawing of the fixing bolt of the present invention.

[0028] Figure 12 This is a schematic diagram of the array cover plate of the present invention.

[0029] Figure 13 This is a schematic diagram of the integrated microphone array board of the present invention.

[0030] Explanation of reference numerals in the attached figures: 1-Array base; A-Regular hexagonal prism; B-Hollow regular hexagonal frustum; C-Hollow regular hexagonal prism; D-Support column; E-Circular groove; F-Cuboid groove; G-Cylindrical groove; 2-Integrated microphone array board; 3-Array cover plate; 4-Long fixing strip; 5-Short fixing strip; 6-Fixing block; H-Rectangle; I-Rectangle; J-Rectangle; K-Right trapezoid; 7-Fixing bolts. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example 1 like Figures 1-13 As shown, this invention provides a microphone array mounting device for acoustic detection of oil and gas pipeline leaks, including a base 1, a support column D, an integrated microphone array plate 2, and an array cover plate 3. The base 1 has a hollow structure, and the cylindrical support column D is connected inside the base 1 for fixing and supporting the integrated microphone array plate 2. Multiple microphone elements are arranged on the integrated microphone array plate 2, and the array cover plate 3 has multiple protective holes at the same positions as the microphone elements. Both the integrated microphone array plate 2 and the array cover plate 3 have fixing holes. The integrated microphone array plate 2 covers the upper opening of the base 1, and the array cover plate 3 covers the upper side of the integrated microphone array plate 2 and is connected to the base 1. The microphone elements are surrounded within the protective holes, and the support column passes through the fixing holes on the integrated microphone array plate 2 and the array cover plate 3.

[0035] Specifically, ordinary microphone array bases and array covers merely fix the array in place. However, over time, deformation of the outer shell and the inadequacy of the fixing method can easily affect the acoustic signals collected by the microphone sensors due to the cover plate and its surface pores, thus causing deviations in the collected acoustic signals and affecting the accuracy of the sound source results. This invention, a microphone array mounting device, belongs to the field of acoustic experiments and acoustic detection. It uses a thinner metal array cover plate, reducing the impact of cover plate pores on data acquisition. Simultaneously, fixing strips and blocks are used to secure the array cover plate and array base, ensuring a firm fit. The central circular fixing post further prevents deformation of the array cover plate, guaranteeing the accuracy of the collected data and sound source localization results.

[0036] Example 2 The base 1 includes a regular hexagonal prism A, a hollow regular hexagonal frustum B, and a hollow regular hexagonal prism C. The hollow regular hexagonal frustum B is connected to the upper side of the regular hexagonal prism A, and the hollow regular hexagonal prism C is connected to the upper side of the hollow regular hexagonal frustum B. The support column D is connected to the upper side of the regular hexagonal prism A and is located inside the hollow regular hexagonal frustum B.

[0037] A circular groove E is located on the upper side of the hollow regular hexagonal prism C. The integrated microphone array plate 2 is disc-shaped, with a diameter identical to that of the circular groove E. The thickness of the integrated array plate 2 is the same as the depth of the circular groove E. This design allows the integrated microphone array plate 2 to fit perfectly into the circular groove E, ensuring array stability. The circular groove E, used to hold the integrated microphone array plate 2, has a depth less than the thickness of the hollow regular hexagonal prism C, and a diameter less than the diameter of the inscribed circle of the outer edge of the hollow regular hexagonal prism C. This design allows the integrated microphone array plate 2 to be placed within the center of the hollow regular hexagonal prism C. This invention uses a circular groove on the array base and cylindrical supports to fix the integrated microphone array plate, ensuring its stable fixation.

[0038] The array cover plate 3 is a regular hexagonal prism. The six sides of the array cover plate 3 coincide with the six outer sides of the upper side of the hollow regular hexagonal prism C. The purpose is to ensure that the array cover plate 3 and the edge of the hollow regular hexagonal prism C are perfectly aligned, which is convenient for fixing and makes the overall array flat.

[0039] There are 3 pillars D, which are tangent to the three spaced inner edges of the lower hexagon of the hollow regular hexagonal frustum B. The height of pillar D is not less than the distance from the upper side of the regular hexagonal prism A to the lower side of the circular groove E. The purpose is to enable the cylindrical pillar (D) to support the column-integrated microphone array board (2).

[0040] The upper hexagon of the hollow regular hexagon B is larger than the lower hexagon. The six sides of the regular hexagon A coincide with the six outer sides of the lower hexagon of the hollow regular hexagon B. The six inner sides of the hollow regular hexagon C coincide with the six inner sides of the upper hexagon of the hollow regular hexagon B. This is to ensure a tight connection between the different components of the array base, preventing excessive protrusions. The diameter of the inscribed circle of the outer side of the hollow regular hexagon C is larger than the diameter of the inscribed circle of the outer side of the upper hexagon of the hollow regular hexagon B, to allow sufficient space for carving the cuboid groove F.

[0041] Example 3 It also includes a long fixing strip 4, a short fixing strip 5, and a fixing block 6; the hollow regular hexagonal prism C has a cuboid groove F on its lower side for placing the long fixing strip 4 and the short fixing strip 5. The long fixing strip 4 and the short fixing strip 5 are placed in the cuboid groove F by lateral sliding. The other side of the long fixing strip 4 and the short fixing strip 5 covers the array cover plate 3, and the fixing block 6 is placed between the long fixing strip 4 and the short fixing strip 5. This invention uses edge fixing strips to fix the array cover plate and the array base together, so that each edge of the array cover plate is tightly fitted to the array base, reducing signal interference that may be caused by deformation of the array cover plate edges. By connecting the integrated array plate with the array base and the array cover plate through fixing strips and fixing blocks, it has the function of simply, stably and reliably fixing the array plate.

[0042] The hollow regular hexagonal prism C has six cuboid grooves F, which are rotationally symmetrical about the central axis of the hollow regular hexagonal prism C, so that the fixing strip can be slidably placed. The depth of the cuboid grooves F is less than the thickness of the hollow regular hexagonal prism C; the width of the cuboid grooves F is less than the distance from the outer edge of the hollow regular hexagonal prism C to the outer edge of the upper side of the hollow regular hexagonal frustum B; the inner surface of the cuboid grooves F coincides with the outer edge of the upper regular hexagon of the hollow regular hexagonal frustum B; one side of the cuboid grooves F extends to the outer edge of the hollow regular hexagonal prism C, and the other side extends to another cuboid groove. This invention uses a groove sliding fixing method to install the fixing strip, which is simple and convenient. At the same time, it uses a fixing block and an embedded screw to stabilize the fixing strip, reducing the use of screws and ensuring the overall flatness, aesthetics and reliability of the array.

[0043] It also includes a fixing bolt 7. One side of the hollow regular hexagonal prism C has a cylindrical groove G. The fixing bolt 7 passes through the fixing block 6 and is inserted into the cylindrical groove G. The entire array is fixed by screwing the fixing bolt 7.

[0044] The interior of the long fixing strip 4 has a channel that is nested with the groove wall of the cuboid groove F. The top of the long fixing strip 4 is an inwardly extending pressure plate, and the array cover plate 3 is pressed onto the hollow regular hexagonal prism C by the pressure plate.

[0045] The cross-section of the long fixing strip 4 consists of channels formed by rectangles H, J, and I, and pressure plates formed by right-angled trapezoids K. The length of rectangle H is the same as the depth of the cuboid groove F, and the width of rectangle H is the same as the width of the cuboid groove F, so that the fixing strip can perfectly fit the cuboid groove F. The length of rectangle I is the sum of the thickness of the hollow regular hexagonal prism C and the thickness of the array cover plate 3, so that the hollow regular hexagonal prism C and the array cover plate 3 fit tightly. The length of rectangle J is the sum of the distance from the outer edge of the hollow regular hexagonal prism C to the upper outer edge of the hollow regular hexagonal frustum B and the width of rectangle I. The height of right-angled trapezoid K is greater than the width of rectangle I, so as to cover the edge of the array cover plate 3 and thus fix the array cover plate.

[0046] The top view of the long fixing strip 4 is an isosceles trapezoid, and the upper base of the isosceles trapezoid is the same length as the upper outer side of the hollow regular hexagonal frustum B. The top view of the short fixing strip 5 is a parallelogram, and the long side of the parallelogram is the same length as the upper outer side of the hollow regular hexagonal frustum B. The purpose is to ensure that the fixing strips fit tightly together and ensure the flatness of the array. The top view of the fixing block 6 is an isosceles triangle, and the legs of the isosceles triangle are the same length as the short side of the parallelogram. The base of the isosceles triangle is the difference between the lower base and the upper base of the isosceles trapezoid. The purpose is to hold the short fixing strip 5 and the long fixing strip 4 in place and ensure the stability of the installation.

[0047] The working principle of this invention is as follows: Place the integrated microphone array board in the circular groove above the array base, then place the array cover on top of both. Align the fixing holes on the microphone array board and the array cover with the cylindrical support column on the array base, and screw in the screws from top to bottom to initially fix the three components. Then, slide the long fixing strips into the cuboid grooves on the edge of the array base one by one, and finally slide the short fixing strips into the last cuboid groove. Next, place the fixing block between the short fixing strip and the first placed long fixing strip, and tighten the fixing bolts to complete the installation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microphone array mounting device for acoustic detection of leaks in oil and gas pipelines, characterized in that, Includes a base (1), a support (D), an integrated microphone array board (2), and an array cover (3); The base (1) is a hollow structure, the support column (D) is connected inside the base (1), the integrated microphone array plate (2) is arranged with multiple microphone components, the array cover plate (3) is provided with multiple protective holes at the same positions as the microphone components, and the integrated microphone array plate (2) and the array cover plate (3) are both provided with fixing holes; The integrated microphone array plate (2) covers the upper opening of the base (1), the array cover plate (3) covers the upper side of the integrated microphone array plate (2) and is connected to the base (1), the microphone component is surrounded in the protective hole, and the support passes through the fixing holes on the integrated microphone array plate (2) and the array cover plate (3).

2. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 1, characterized in that, The base (1) includes a regular hexagonal prism (A), a hollow regular hexagonal frustum (B) and a hollow regular hexagonal prism (C). The hollow regular hexagonal frustum (B) is connected to the upper side of the regular hexagonal prism (A), and the hollow regular hexagonal prism (C) is connected to the upper side of the hollow regular hexagonal frustum (B). The support (D) is connected to the upper side of the regular hexagonal prism (A) and is located inside the hollow regular hexagonal frustum (B).

3. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 2, characterized in that, The hollow regular hexagonal prism (C) has a circular groove (E) on its upper side, and the integrated microphone array board (2) is disc-shaped and is embedded in the circular groove (E).

4. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 3, characterized in that, There are 3 pillars (D), which are tangent to the three spaced inner sides of the lower hexagon of the hollow regular hexagonal truncated pyramid (B). The height of the pillar (D) is not less than the distance from the upper side of the regular hexagonal prism (A) to the lower side of the circular groove (E).

5. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 2, characterized in that, It also includes a long fixing strip (4), a short fixing strip (5), and a fixing block (6); The hollow regular hexagonal prism (C) has a cuboid groove (F) on its lower side. The long fixing strip (4) and the short fixing strip (5) are placed in the cuboid groove (F) by lateral sliding. The other side of the long fixing strip (4) and the short fixing strip (5) covers the array cover plate (3). The fixing block (6) is placed between the long fixing strip (4) and the short fixing strip (5).

6. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 5, characterized in that, The hollow regular hexagonal prism (C) has six rectangular grooves (F) that are rotationally symmetrical about the central axis of the hollow regular hexagonal prism (C); The depth of the cuboid groove (F) is less than the thickness of the hollow regular hexagonal prism (C); The width of the cuboid groove (F) is less than the distance from the outer edge of the hollow regular hexagonal prism (C) to the upper outer edge of the hollow regular hexagonal frustum (B); The inner side of the cuboid groove (F) coincides with the outer side of the upper regular hexagon of the hollow regular hexagonal frustum (B); The cuboid groove (F) extends to the outer edge of the hollow regular hexagonal prism (C) on one side and extends to another cuboid groove on the other side.

7. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 5, characterized in that, It also includes a fixing bolt (7), one side of the hollow regular hexagonal prism (C) has a cylindrical groove (G), and the fixing bolt (7) passes through the fixing block (6) and is inserted into the cylindrical groove (G).

8. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 5, characterized in that, The interior of the long fixing strip (4) is provided with a channel that is nested with the groove wall of the cuboid groove (F). The top of the long fixing strip (4) is an inwardly extending pressure plate. The array cover plate (3) is pressed onto the hollow regular hexagonal prism (C) by the pressure plate.

9. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 8, characterized in that, The cross section of the long fixing strip (4) is composed of channels made up of rectangles (H), rectangles (J) and rectangles (I), and pressure plates made up of right-angled trapezoids (K); The length of the rectangle (H) is the same as the depth of the cuboid groove (F), and the width of the rectangle (H) is the same as the width of the cuboid groove (F). The length of the rectangle (I) is the sum of the thickness of the hollow regular hexagonal prism (C) and the thickness of the array cover plate (3); The length of the rectangle (J) is the sum of the distance from the outer edge of the hollow regular hexagonal prism (C) to the upper outer edge of the hollow regular hexagonal frustum (B) and the width of the rectangle (I); The height of the right trapezoid (K) is greater than the width of the rectangle (I).

10. The microphone array mounting device for acoustic detection of oil and gas pipeline leaks according to claim 2, characterized in that, The upper regular hexagon of the hollow regular hexagonal frustum (B) has a larger size than the lower regular hexagon, and the six sides of the regular hexagonal prism (A) coincide with the six outer sides of the lower regular hexagon of the hollow regular hexagonal frustum (B). The six inner sides of the hollow regular hexagonal prism (C) coincide with the six inner sides of the upper hexagon of the hollow regular hexagonal frustum (B), and the diameter of the outer inscribed circle of the hollow regular hexagonal prism (C) is larger than the diameter of the outer inscribed circle of the upper hexagon of the hollow regular hexagonal frustum (B).

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